Controle de temperatura on/off aplicado em uma estufa estacionária industrial

• Autor(a) principal: Pereira Martins, Filipe Marques
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/56410
• topic: Automação industrial; Controle on/off; Temperatura

This work presents the characteristics of an automation solution proposed for the improvement of an industrial process in a nut factory. This work process deals with the drying of cashew nut almonds and was developed in one of the greenhouses in the sector. The almonds are inserted in stationary greenhouses that are equipped with a heating system that works by convection. At the top of the structures there is a pipe that is traversed by saturated steam produced by an industrial boiler. The drying process takes place by convection inside the greenhouses. The need to ensure a more precise operation of the greenhouses was observed, since the temperature control of the rooms was done manually by the operators and very susceptible to failures and deviations. Thus, a survey of the application conditions was carried out and a low-cost automation that would meet the company's needs was proposed. A ON/OFF control system using a temperature controller is proposed to deal with this issue. The equipment monitors the temperature of the system through the signal sent by a temperature sensor of the type PT-100 installed inside the rooms and controls the flow of steam in the greenhouse’s pipe through an electropneumatic valve installed in the pipeline. The work provides details of the main components used in the implementation of the solution and a comparison is made between manual and automatic operation. Different setups were tested and the results are shown in graphs. The proposed improvement technique was justified by the comparison between the experimental data and the manual operation.